Subject: [PATCH 068/104] ASoC: dapm - Add API call to query valid DAPM paths.

In preparation for ASoC DSP support.

Add a DAPM API call to determine whether a DAPM audio path is valid between
source and sink widgets. This also takes into account all kcontrol mux and mixer
settings in between the source and sink widgets to validate the audio path.

This will be used by the DSP core to determine the runtime DAI mappings
between FE and BE DAIs in order to run PCM operations.

Signed-off-by: Liam Girdwood <lrg@ti.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/include/sound/soc-dapm.h b/include/sound/soc-dapm.h
index 122e7a24ab3..0f67cf6383d 100644
--- a/include/sound/soc-dapm.h
+++ b/include/sound/soc-dapm.h
@@ -310,6 +310,7 @@ struct snd_soc_dapm_path;
 struct snd_soc_dapm_pin;
 struct snd_soc_dapm_route;
 struct snd_soc_dapm_context;
+struct snd_soc_dapm_widget_list;
 
 int dapm_reg_event(struct snd_soc_dapm_widget *w,
                    struct snd_kcontrol *kcontrol, int event);
@@ -375,6 +376,13 @@ int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
                                 const char *pin);
 
+/* dapm path query */
+int snd_soc_dapm_get_connected_widgets_type(struct snd_soc_dapm_context *dapm,
+                const char *stream_name, struct snd_soc_dapm_widget_list **list,
+                int stream, enum snd_soc_dapm_type type);
+int snd_soc_dapm_get_connected_widgets_name(struct snd_soc_dapm_context *dapm,
+                const char *name, struct snd_soc_dapm_widget_list **list, int stream);
+
 /* dapm widget types */
 enum snd_soc_dapm_type {
         snd_soc_dapm_input = 0,         /* input pin */
@@ -432,6 +440,8 @@ struct snd_soc_dapm_path {
         u32 connect:1;  /* source and sink widgets are connected */
         u32 walked:1;   /* path has been walked */
         u32 weak:1;     /* path ignored for power management */
+        u32 length:6;   /* path length - used by route checker */
+
 
         int (*connected)(struct snd_soc_dapm_widget *source,
                          struct snd_soc_dapm_widget *sink);
@@ -456,6 +466,8 @@ struct snd_soc_dapm_widget {
         unsigned char shift;                    /* bits to shift */
         unsigned int saved_value;               /* widget saved value */
         unsigned int value;                             /* widget current value */
+        unsigned int path_idx;
+        unsigned int hops;
         unsigned int mask;                      /* non-shifted mask */
         unsigned int on_val;                    /* on state value */
         unsigned int off_val;                   /* off state value */
@@ -520,6 +532,8 @@ struct snd_soc_dapm_context {
 
         int (*stream_event)(struct snd_soc_dapm_context *dapm);
 
+        int num_valid_paths; /* valid paths for route checker */
+
 #ifdef CONFIG_DEBUG_FS
         struct dentry *debugfs_dapm;
 #endif